Find the following values without a calculator.
Give your answers in this manner. (Eg 10%, 20%, 30%, 40%)
- Express 400 mℓ as a percentage of 5 ℓ.
- Express 4000 mℓ as a percentage of 8 ℓ.
- Express 60 min as a percentage of 5 hours.
- Express 4 min as a percentage of 20 seconds.
(a)
1 ℓ = 1000 mℓ
5 ℓ = 5000 mℓ
4005000 x 100% = 8%
(b)
4000 mℓ = 4 ℓ
48 x 100% = 50%
(c)
1 h = 60 min
5 h = 300 min
60300 x 100% = 20%
(d)
1 min = 60 seconds
4 min = 240 seconds
24020 x 100% = 1200%
Answer(s): 8%, 50%, 20%, 1200%